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#include "exception.hh"
#ifdef __GXX_RTTI
#include <typeinfo>
#endif
#include <cerrno>
#include <cstring>
#if defined(_WIN32) || defined(_WIN64)
#include <windows.h>
#include <io.h>
#endif
namespace util {
Exception::Exception() throw() {}
Exception::~Exception() throw() {}
void Exception::SetLocation(const char *file, unsigned int line, const char *func, const char *child_name, const char *condition) {
/* The child class might have set some text, but we want this to come first.
* Another option would be passing this information to the constructor, but
* then child classes would have to accept constructor arguments and pass
* them down.
*/
std::string old_text;
what_.swap(old_text);
what_ << file << ':' << line;
if (func) what_ << " in " << func << " threw ";
if (child_name) {
what_ << child_name;
} else {
#ifdef __GXX_RTTI
what_ << typeid(this).name();
#else
what_ << "an exception";
#endif
}
if (condition) {
what_ << " because `" << condition << '\'';
}
what_ << ".\n";
what_ << old_text;
}
namespace {
#ifdef __GNUC__
const char *HandleStrerror(int ret, const char *buf) __attribute__ ((unused));
const char *HandleStrerror(const char *ret, const char * /*buf*/) __attribute__ ((unused));
#endif
// At least one of these functions will not be called.
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-function"
#endif
// The XOPEN version.
const char *HandleStrerror(int ret, const char *buf) {
if (!ret) return buf;
return NULL;
}
// The GNU version.
const char *HandleStrerror(const char *ret, const char * /*buf*/) {
return ret;
}
#ifdef __clang__
#pragma clang diagnostic pop
#endif
} // namespace
ErrnoException::ErrnoException() throw() : errno_(errno) {
char buf[200];
buf[0] = 0;
#if defined(sun) || defined(_WIN32) || defined(_WIN64)
const char *add = strerror(errno);
#else
const char *add = HandleStrerror(strerror_r(errno, buf, 200), buf);
#endif
if (add) {
*this << add << ' ';
}
}
ErrnoException::~ErrnoException() throw() {}
OverflowException::OverflowException() throw() {}
OverflowException::~OverflowException() throw() {}
#if defined(_WIN32) || defined(_WIN64)
WindowsException::WindowsException() throw() {
unsigned int last_error = GetLastError();
char error_msg[256] = "";
if (!FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, last_error, LANG_NEUTRAL, error_msg, sizeof(error_msg), NULL)) {
*this << "Windows error " << GetLastError() << " while formatting Windows error " << last_error << ". ";
} else {
*this << "Windows error " << last_error << ": " << error_msg;
}
}
WindowsException::~WindowsException() throw() {}
#endif
} // namespace util
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